diff --git a/mautrix_telegram/db.py b/mautrix_telegram/db.py
index 81829c7a..4f48412c 100644
--- a/mautrix_telegram/db.py
+++ b/mautrix_telegram/db.py
@@ -112,7 +112,7 @@ class TelegramFile(Base):
     mxc = Column(String)
     mime_type = Column(String)
     was_converted = Column(Boolean)
-    timestamp = Column(BigInteger, primary_key=True)
+    timestamp = Column(BigInteger)
 
 
 def init(db_session):
diff --git a/mautrix_telegram/util/file_transfer.py b/mautrix_telegram/util/file_transfer.py
index 698cb874..76e113b3 100644
--- a/mautrix_telegram/util/file_transfer.py
+++ b/mautrix_telegram/util/file_transfer.py
@@ -44,7 +44,7 @@ def _convert_webp(file, to="png"):
 async def transfer_file_to_matrix(db, client, intent, location):
     if isinstance(location, (Document, InputDocumentFileLocation)):
         id = f"{location.id}-{location.version}"
-    elif not isinstance(location, (FileLocation, InputFileLocation)):
+    elif isinstance(location, (FileLocation, InputFileLocation)):
         id = f"{location.volume_id}-{location.local_id}"
     else:
         return None